contracts: Add RPC that allows instantiating of a contract (#8451)

* contracts: Add RPC that allows instantiating of a contract

* Encode `debug_message` as bytes because usage of `String` is forbidden

* Remove erroneous derive attribute

* Fix rpc tests for new `debug_message` encoding

* Fix typo

Co-authored-by: Andrew Jones <ascjones@gmail.com>

Co-authored-by: Andrew Jones <ascjones@gmail.com>

substrate/bin/node/runtime/src/lib.rs

@@ -1340,7 +1340,9 @@ impl_runtime_apis! {
 		}
 	}
 
-	impl pallet_contracts_rpc_runtime_api::ContractsApi<Block, AccountId, Balance, BlockNumber>
+	impl pallet_contracts_rpc_runtime_api::ContractsApi<
+		Block, AccountId, Balance, BlockNumber, Hash,
+	>
 		for Runtime
 	{
 		fn call(
@@ -1353,6 +1355,18 @@ impl_runtime_apis! {
 			Contracts::bare_call(origin, dest, value, gas_limit, input_data)
 		}
 
+		fn instantiate(
+			origin: AccountId,
+			endowment: Balance,
+			gas_limit: u64,
+			code: pallet_contracts_primitives::Code<Hash>,
+			data: Vec<u8>,
+			salt: Vec<u8>,
+		) -> pallet_contracts_primitives::ContractInstantiateResult<AccountId, BlockNumber>
+		{
+			Contracts::bare_instantiate(origin, endowment, gas_limit, code, data, salt, true)
+		}
+
 		fn get_storage(
 			address: AccountId,
 			key: [u8; 32],